How to Vote by Mail in Pennsylvania: Apply, Sign, and Return

To vote by mail in Pennsylvania, register to vote at least 15 days before the election, apply for a mail-in ballot by 5:00 PM on the Tuesday one week before Election Day, then mark your ballot, seal it inside the secrecy envelope and the signed and dated outer return envelope, and get it to your county board of elections by 8:00 PM on Election Day.¹ Act 77 of 2019 opened mail voting to any registered voter in the Commonwealth, no excuse required.² The steps below walk through each stage, with attention to the small mistakes that most often get a ballot thrown out.

Register to Vote First

You cannot request a mail-in ballot unless you are already a registered Pennsylvania voter, and the registration deadline is 15 days before the election.³ Miss that cutoff and you cannot vote by mail or in person in that election. You can register online, by mail, or at your county voter registration office.

Apply for Your Mail-in Ballot

Applications are available through the Pennsylvania Department of State website or in person at your county election office. The application window opens 50 days before the election and closes at 5:00 PM on the first Tuesday before Election Day, which is exactly one week ahead.¹ Applications arriving after that cutoff are rejected for the cycle.

The application asks for your name, date of birth, how long you have lived in your voting district, the district itself if you know it, your party choice for primaries, and the address where you want the ballot sent.⁴ For identification, provide your Pennsylvania driver’s license number or PennDOT ID number. If you have neither, use the last four digits of your Social Security number. Your county board verifies this against state records before approving the application.⁵

If the application is rejected, the board must notify you and explain why. If your identification could not be verified, the board will send the ballot anyway with a notice, and you get a chance to provide acceptable proof when you return the ballot. Without it, the ballot will not count.⁵

The Annual Mail Ballot List Is Not Permanent

Pennsylvania offers an annual mail ballot list. Sign up once and you receive a ballot automatically for every election through the following February. After that, your county sends a reminder, but you must submit a new request each year to stay on the list.⁶ Receiving ballots last year does not mean you will receive one this year. Mark your calendar.

Fill Out Your Ballot Correctly

Your packet includes the ballot, two envelopes, and instructions. How you handle these materials decides whether your vote counts. Doing this wrong is the most common reason mail-in ballots are rejected in Pennsylvania, so slow down for this part.

Mark the Ballot

Use a pen with blue or black ink, or a pencil. The statute also permits indelible pencil, fountain pen, or ballpoint pen.⁷ A standard pen is fine.

Use the Secrecy Envelope

Fold the marked ballot and place it inside the smaller inner envelope labeled “Official Election Ballot.” This is the secrecy envelope, and using it is mandatory.⁸ A ballot returned without it is called a “naked ballot,” and the Pennsylvania Supreme Court has ruled that naked ballots are invalid and cannot be counted. The court found the secrecy envelope requirement is mandatory because it keeps election workers from seeing how you voted when the outer envelope is opened.⁹ Seal the secrecy envelope.

Sign and Date the Outer Envelope

Place the sealed secrecy envelope into the larger outer return envelope. The back carries a printed voter declaration. Sign it and write the current date.⁷ If illness or physical disability prevents you from signing, you may make your mark, witnessed by one adult.

The handwritten date requirement has been the subject of ongoing federal litigation. A federal district court has ruled that rejecting an otherwise timely ballot solely for a missing or incorrect date violates the federal Civil Rights Act. The issue remains legally unsettled, and the safe course is to write the current date accurately. A missing signature or date gives the county board grounds to reject your ballot, and you may not have time to fix it.

Return Your Ballot by 8:00 PM on Election Day

Your completed ballot must reach your county board of elections by 8:00 PM on Election Day. This is a receipt deadline, not a postmark deadline. A ballot mailed on time but delivered Wednesday does not count.⁷

You have three ways to return it:

By U.S. mail, postage prepaid, to your county board of elections. Build in several days of transit, because the postal service cannot guarantee overnight delivery.
In person at your county board of elections office.¹⁰
At an official county ballot drop box, where available. State law does not specifically address drop boxes, but as of late 2025, roughly 29 counties offered them. Check with your county election office for locations.

You Have to Return It Yourself

Pennsylvania law requires you to personally mail or deliver your ballot. Letting someone else drop it off is not permitted and can carry criminal penalties.¹¹ The one exception is for voters with a disability, who may complete a designated agent form authorizing another person to pick up and deliver their ballot materials.¹²

Track Your Ballot

After you send your ballot, check its status at pavoterservices.pa.gov. The portal confirms when your county received and processed the ballot, which gives you an early warning if something went wrong in delivery.

If Your Ballot Has a Defect

The common defects that invalidate a mail-in ballot are returning it without the secrecy envelope, forgetting to sign the outer declaration, and leaving the date blank. Any of these can get your ballot set aside.

In September 2025, the Pennsylvania Supreme Court ruled that when a county board identifies a defective ballot, it must notify the voter that the ballot will be rejected. The court reasoned that election law should favor the right to vote rather than let counties silently discard ballots. The ruling stopped short of requiring counties to let voters fix the error on the ballot itself. The practical safety net is the provisional ballot: the Pennsylvania Supreme Court has separately held that if your mail-in ballot is rejected for any reason, you may cast a valid provisional ballot on Election Day, and the county must count it.

The lesson is blunt. Fill out the ballot correctly the first time. The notification and provisional backup exist, but relying on either means showing up at the polls anyway, which defeats the purpose of voting by mail.

If You Change Your Mind and Want to Vote in Person

If you requested a mail-in ballot but decide you would rather vote at your polling place, the law gives you a path. What that path looks like depends on whether you still have your ballot.¹³

If you still have your unvoted ballot, bring it along with the pre-addressed outer return envelope to your polling place. Surrender both to the judge of elections, sign a declaration confirming you have not already voted by mail, and cast a regular ballot at the machine.⁷
If you cannot produce the ballot and envelope, you can only vote provisionally. Your county board will verify you did not also vote by mail before counting the provisional ballot.

If you have already submitted your mail-in ballot, you cannot vote in person. The district register at each polling place identifies voters who have already voted by mail, and poll workers will not issue you a ballot.

Mail-in vs. Absentee: Which Form Applies to You

Most Pennsylvania voters use the mail-in ballot, which is available to any qualified registered voter for any reason.² The absentee ballot is a separate category for specific situations: military service members and their spouses or dependents, people serving with the Merchant Marine, voters with an illness or physical disability that prevents them from reaching the polls, voters who expect to be away from their municipality during all polling hours on Election Day, and people attached to religious or welfare groups officially serving with the armed forces.¹⁴ The procedures for completing and returning the ballot are nearly identical, and the deadlines are the same. The difference is which box you check on the application.

1
Pennsylvania General Assembly. Pennsylvania Code 25 P.S. 3150.12a – Date of Application for Mail-in Ballot
2
Pennsylvania General Assembly. Pennsylvania Code 25 P.S. 3150.11 – Qualified Mail-in Electors
3
Commonwealth of Pennsylvania. Voter Registration
4
Pennsylvania General Assembly. Pennsylvania Code 25 P.S. 3150.12 – Applications for Official Mail-in Ballots
5
Pennsylvania General Assembly. Pennsylvania Code 25 P.S. 3150.12b – Approval of Application for Mail-in Ballot
6
Commonwealth of Pennsylvania. Annual Mail Ballot List
7
Pennsylvania General Assembly. Pennsylvania Code 25 P.S. 3150.16 – Voting by Mail-in Electors
8
Pennsylvania General Assembly. Pennsylvania Code 25 P.S. 3150.14 – Envelopes for Official Mail-in Ballots
9
Administrative Office of Pennsylvania Courts. In Re: Canvass of Absentee and/or Mail-in Ballots
10
Pennsylvania Department of State. Pennsylvania Absentee and Mail-in Ballot In-Person Return Guidance
11
Pennsylvania General Assembly. Pennsylvania Code 25 P.S. 3146.6 – Voting by Absentee Electors
12
Commonwealth of Pennsylvania. Designated Agent Form for Mail-in or Absentee Ballot
13
Commonwealth of Pennsylvania. Mail-in and Absentee Ballot
14
Pennsylvania General Assembly. Pennsylvania Code 25 P.S. 3146.1 – Qualified Absentee Electors